Structure of the human sterol O-acyltransferase 1 in complex with CI-976

Experimental Data Snapshot

  • Resolution: 3.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report

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Structural insights into the inhibition mechanism of human sterol O-acyltransferase 1 by a competitive inhibitor.

Guan, C.Niu, Y.Chen, S.C.Kang, Y.Wu, J.X.Nishi, K.Chang, C.C.Y.Chang, T.Y.Luo, T.Chen, L.

(2020) Nat Commun 11: 2478-2478

  • DOI: https://doi.org/10.1038/s41467-020-16288-4
  • Primary Citation of Related Structures:  
    6L47, 6L48

  • PubMed Abstract: 

    Sterol O-acyltransferase 1 (SOAT1) is an endoplasmic reticulum (ER) resident, multi-transmembrane enzyme that belongs to the membrane-bound O-acyltransferase (MBOAT) family. It catalyzes the esterification of cholesterol to generate cholesteryl esters for cholesterol storage. SOAT1 is a target to treat several human diseases. However, its structure and mechanism remain elusive since its discovery. Here, we report the structure of human SOAT1 (hSOAT1) determined by cryo-EM. hSOAT1 is a tetramer consisted of a dimer of dimer. The structure of hSOAT1 dimer at 3.5 Å resolution reveals that a small molecule inhibitor CI-976 binds inside the catalytic chamber and blocks the accessibility of the active site residues H460, N421 and W420. Our results pave the way for future mechanistic study and rational drug design targeting hSOAT1 and other mammalian MBOAT family members.

  • Organizational Affiliation

    State Key Laboratory of Membrane Biology, Institute of Molecular Medicine, Peking University, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, 100871, Beijing, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Sterol O-acyltransferase 1
A, B
485Homo sapiensMutation(s): 0 
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P35610 (Homo sapiens)
Explore P35610 
Go to UniProtKB:  P35610
PHAROS:  P35610
GTEx:  ENSG00000057252 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP35610
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Ministry of Science and Technology (China)China2016YFA0502004
National Natural Science Foundation of ChinaChina31622021
National Science Foundation (China)China91857000
National Science Foundation (China)China31821091
National Natural Science Foundation of ChinaChina31870833

Revision History  (Full details and data files)

  • Version 1.0: 2020-04-29
    Type: Initial release
  • Version 1.1: 2020-10-07
    Changes: Database references